Marc Anthony wrapped up his holiday shopping on Fridaywith lunch in Fred’s at Barneys with his rumored new girlfriend, 28-year-old Mexican model Adriana Ontiveros. The two shared a quiet meal at the Madison Avenue department store with a male friend. Anthony, 43, wearing a casual zip top, sat between Ontiveros and his pal, a witness reports. Anthony was most recently spotted with Ontiveros at the Miami Dolphins’ home game on Dec. 11. His estranged wife, Jennifer Lopez, 42, found comfort in the arms of a younger lover after their split. Amid their heated custody battle, she has been seeing a 24-year-old boy toy, backup dancer Casper Smart.